Ionia Weather Forecast

    • 41
    • 64

    Mostly Sunny

    • 35
    • 59

    Mostly Sunny

    • 35
    • 58

    Mostly Sunny

    • 39
    • 60

    Partly Sunny

    • 33
    • 55

    Mostly Sunny

    • 38
    • 59

    Mostly Sunny

Today 19 Oct Ontario

Sunny. Highs Ranging from around 60 on the Hilltops to the mid 60s across the lower Elevations. Light Winds.

Tonight 19 Oct Ontario

Mainly clear. Lows in the lower 40s. Light northwest Winds.

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Ionia Temperature Statistics

October Temperature

Rochester, Greater Rochester International Airport (15.5 miles)

  • Lowest 6 October, 2026

    36.6 °F

  • Average October

    57.6 °F

  • Highest 13 October, 2026

    82.7 °F

Climate (2021–2026)

Rochester, Greater Rochester International Airport (15.5 miles)

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  • Average Low 2021–2026

    42.2 °F

  • Average 2021–2026

    50.7 °F

  • Average High 2021–2026

    59.5 °F
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